Towards Multifunctional Characteristics of Embedded Structures With Carbon Nanotube Yarns

This paper presents recent results on research of achieving multifunctional structures utilizing Carbon Nanotube (CNT) yarns. The investigation centers on creating composite structures with CNT yarns to simultaneously achieve increases in mechanical strength and the ability to sense strain. The CNT yarns used in our experiments are of the single-ply and two-ply variety with the single-ply yarns having diameters on the order of 10–20 μm. The yarns are embedded in silicon rubber and polyurethane test specimens. Mechanical tests show an increase in modulus of elasticity, with an additional weight increase of far less than one-percent. Sensing characteristics of the yarns are investigated on stainless steel test beams in an electrical bridge configuration, and are observed to have a strain sensitivity of 0.7mV/V/1000 micro-strain. Also reported are measurements of the average strain distribution along the direction of the CNT yarns on square silicon rubber membranes.

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Multifunctional Characteristics of Carbon Nanotube (CNT) Yarn Composites

Multifunctional Nanocomposites ◽

10.1115/mn2006-17028 ◽

2006 ◽

Cited By ~ 1

Author(s):

Corey D. Hernandez ◽

Mei Zhang ◽

Shaoli Fang ◽

Ray H. Baughman ◽

Thomas S. Gates ◽

...

Keyword(s):

Carbon Nanotube ◽

Composite Materials ◽

Mechanical Strength ◽

Composite Structures ◽

Initial Temperature ◽

Strain Sensing ◽

Flexible Membrane ◽

Strength Tests ◽

Weight Penalty ◽

Sensing Characteristics

By forming composite structures with Carbon Nanotube (CNT) yarns we achieve materials capable of measuring strain and composite structures with increased mechanical strength. The CNT yarns used are of the 2-ply and 4-ply variety with the yarns having diameters of about 15–30 μm. The strain sensing characteristics of the yarns are investigated on test beams with the yarns arranged in a bridge configuration. Additionally, the strain sensing properties are also investigated on yarns embedded on the surface of a flexible membrane. Initial mechanical strength tests also show an increase in the modulus of elasticity of the composite materials while incurring a weight penalty of less than one-percent. Also presented are initial temperature characterizations of the yarns.

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Hydrogen sensing characteristics of carbon-nanotube sheet decorated with manganese oxides

Chemical Physics Letters ◽

10.1016/j.cplett.2013.05.047 ◽

2013 ◽

Vol 577 ◽

pp. 96-101 ◽

Cited By ~ 24

Author(s):

Daewoong Jung ◽

Youngsam Yoon ◽

Gil S. Lee

Keyword(s):

Carbon Nanotube ◽

Manganese Oxides ◽

Hydrogen Sensing ◽

Sensing Characteristics

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Synthesis of CNTs on stainless steel microfibrous composite by CVD: Effect of synthesis condition on carbon nanotube growth and structure

Composites Part B Engineering ◽

10.1016/j.compositesb.2018.12.100 ◽

2019 ◽

Vol 160 ◽

pp. 369-383 ◽

Cited By ~ 24

Author(s):

Yi Yang ◽

Huiping Zhang ◽

Ying Yan

Keyword(s):

Stainless Steel ◽

Carbon Nanotube ◽

Synthesis Condition ◽

Carbon Nanotube Growth ◽

Nanotube Growth

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In situ growth of self-supported and defect-engineered carbon nanotube networks on 316L stainless steel as binder-free supercapacitors

Journal of Colloid and Interface Science ◽

10.1016/j.jcis.2018.08.035 ◽

2018 ◽

Vol 532 ◽

pp. 622-629 ◽

Cited By ~ 7

Author(s):

Rui Lei ◽

Hongwei Ni ◽

Rongsheng Chen ◽

Huazhi Gu ◽

Hua Zhang ◽

...

Keyword(s):

Stainless Steel ◽

Carbon Nanotube ◽

316L Stainless Steel ◽

In Situ Growth ◽

Binder Free ◽

Carbon Nanotube Networks

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Mechanical Testing of Composite Steel and Reactive Powder Concrete Structural Element

Materials ◽

10.3390/ma13183954 ◽

2020 ◽

Vol 13 (18) ◽

pp. 3954

Author(s):

Jan Bujnak ◽

Peter Michalek ◽

Frantisek Bahleda ◽

Stefania Grzeszczyk ◽

Aneta Matuszek-Chmurowska ◽

...

Keyword(s):

Compressive Strength ◽

Composite Structures ◽

Numerical Models ◽

Concrete Slab ◽

Initial Study ◽

Cementitious Materials ◽

Mechanical Tests ◽

Reactive Powder Concrete ◽

Structural Element ◽

Reactive Powder

Reactive powder concrete (RPC), typically with higher compressive strength, is particularly attractive to structural engineers to apply them in infrastructures for enhancing their resistance under severe environments and loads. The main objective of the initial study presented in the paper was to investigate the behavior of two types of these new cementitious materials differing in the nature of microfibers. The RPC mixes were reinforced with steel and then with basalt microfibers. To evaluate the structural performance of developed unconventional materials, properties were investigated experimentally and compared with the control normal concrete mix. Mechanical tests indicated that dispersing fine fibers for making RPC, a mean compressive strength of 198.3 MPa and flexural strength 52.6 MPa or 23.2 MPa, respectively, were developed after 28 days of standard curing at ambient temperatures. In composite structures consisting of steel girders and a concrete slab, it is necessary to prevent the relative slip at the steel and concrete interface using shear connectors. The very high RPC strength enabled a material saving, weight-reduced application of precast construction, and particularly effective joint to steel beams. The investigation of such shear connection efficiency, in the case of the higher strength concrete deck, using standard push-out test specimens was executed. Finite element numerical models were developed. The outputs of the studies are presented in the paper.

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